1999 NISSAN PRIMERA Electronic Repair Manual

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Page 1945 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Signals from each sensor, PTC, A/C switch etc. are sent to the
air flow volume arithmetic circuit in the auto amplifier. Air flow
volume is determined by this circuit.
(1) When the air flow volume is

Page 1946 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual (2) When set to HI
The air flow volume arithmetic circuit gives current to Tr
p1,
which turns the HI relay on. Thus, the blower motor rotates
in the HI condition. Also, Tr
p2and Trp3are receiving cur-

Page 1947 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual STARTING FAN SPEED CONTROL
The starting fan control system is so designed to prevent excess cold air from being expelled after the engine
is started when the engine coolant temperature is low.
The com

Page 1948 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual SHA578CA Auto amplifier
Air flows volume arith-
metic circuitHI relay
MH relay
ML relay
LO relay
Fan switch (AUTO)IGN ACC
Resistor
SYSTEM DESCRIPTIONAUTO
Control System Output Components (Contd)
HA-9

Page 1949 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual HFC-134a (R-134a) Service Procedure
SETTING OF SERVICE TOOLS AND EQUIPMENT
DISCHARGING REFRIGERANT
WARNING:
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nos

Page 1950 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Recovered lubricant. HA-100.Set the recovery/recycling equip-
ment.Discharge refrigerant into recovery/
recycling equipment.
Repair or replace parts.
Evacuate the unwanted air in
charging hoses.
Evacu

Page 1951 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Maintenance of Lubricant Quantity in
Compressor
The lubricant used to lubricate the compressor circulates through
the system with the refrigerant. Add lubricant to compressor
when replacing any compon

Maintenance of Lubricant Quantity in
Compressor
The lubricant used to lubricate the compressor circulates through
the system with the refrigerant. Add lubricant to compressor
when replacing any component or after a large gas leakage
occurred. It is important to maintain the specified amount.
If lubricant quantity is not maintained properly, the following mal-
functions may result:
lLack of lubricant: May lead to a seized compressor
lExcessive lubricant: Inadequate cooling (thermal exchange
interference)
LUBRICANT
CR-14
Name: Nissan A/C System Oil Type R
Part number: KLH00-PAGR0
CSV613
Name: Nissan A/C System Oil Type S
Part number: KLH00-PAGS0
CHECKING AND ADJUSTING
Adjust the lubricant quantity according to the flowchart shown
below.START
Can lubricant return operation be per-
formed?
lA/C system works properly.
lThere is no evidence of a large amount
of lubricant leakage.
No
EYe s
Perform lubricant return operation, proceeding as follows:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Start engine, and set the following conditions:
lTest condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature
is 25 to 30ÉC (77 to 86ÉF).]
2. Next item is for CSV613 compressor. Connect the manifold
gauge, and check that the high pressure side pressure is588
kPa (5.9 bar, 6 kg/cm
2, 85 psi) or higher.
If less than the reference level, attach a cover to the front face
of the condenser to raise the pressure.
3. Perform lubricant return operation for about 10 minutes.
4. Stop engine.
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubri-
cant return operation.
Should the compressor be replaced?
No Yes
F
pA
(Go to next page.)
Is there any part to be replaced?
(Evaporator, condenser, liquid tank or in
case there is evidence of a large amount
of lubricant leakage.)
No
EYe s
After replacing any of the following major components, add the correct
amount of lubricant to the system.
Amount of lubricant to be added
*1: If compressor is replaced, addition of lubricant is included in the
flow chart.
*2: If refrigerant leak is small, no addition of lubricant is needed.
Carry out the A/C performance test.F
Part replacedLubricant to be added to system
Remarks
Amount of lubricant
m(Imp fl oz)
Evaporator 75 (2.6) Ð
Condenser 75 (2.6) Ð
Liquid tank 5 (0.2)Add if compressor is
not replaced. *1
In case of refrigerant
leak30 (1.1) Large leak
Ð Small leak*2
H
H
H
H
H
SERVICE PROCEDURESAUTO
HA-102

Page 1952 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual pA
H
1.Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into the recovery/
recycling equipment.
2. Remove the drain plug of the ªoldº(removed) co

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